.my-plane {
	position: fixed;
	bottom: 5vh;
}
.di-samll-plane {
	position: fixed;
}
.di-middle-plane {
	position: fixed;
}
.di-boss-plane {
	position: fixed;
}
.bullet {
	position: fixed;
}

#box {
	text-align: left;
	position: fixed;
	left: 2vw;
	z-index: 1;
	color: blue;
	font-size: 1.2rem;
	font-family: 楷体;
	user-select: none;
}

#duihua {
	z-index: 1;
	top: 36vh;
	display: none;
	position: fixed;
	border: 1px solid black;
	background-color: #ddd;
	transform: translateX(-50%);

	& > a {
		display: inline-block;
		padding: 16px 50px;
		cursor: pointer;

		&:hover {
			background-color: gray;
			color: white;
		}
	}
}
